Naruto: Becoming the Supreme Taijutsu Master from the Akimichi Clan

[Written with guidance from a ninja-not just made-up nonsense.]

After suffering a backlash while using the Power of Nine Dragons to work out, Denji transmigrates into the world of Naruto. He becomes Choza Akimichi's son and Choji Akimichi's older brother-Denji Akimichi.

All he wanted was to use the Akimichi clan's Expansion Jutsu to become an absolute muscle monster and test the limits of the human body. But the system siphons off every bit of excess energy-he can't even get fat!

Danzo Shimura ahead, Hiruzen Sarutobi behind, the Akatsuki on the left, and Madara Uchiha on the right. Powerful foes surround him, watching like tigers waiting to pounce.

If that's how it's going to be, I'm done being human! Deep Blue, add points!

Energy has reached 100. Add points to Constitution!

Hinata Hyuga's wish [But I Was Here First] fulfilled. Wish Points +1.

Ino Yamanaka's wish [I'll Win This Time] fulfilled. Wish Points +1.

Congratulations! The Akimichi Clan Chakra Refinement Technique has reached Transcendent Mastery. Kekkei Genkai [Scorch Release] awakened.

Successfully confessed your love to Hinata. Hinata's cherished wish [The Moon Is Beautiful Tonight] fulfilled. Cherished Wish Reward obtained-[Pure Byakugan]!

Kaguya Otsutsuki: "Ten years, then another ten years! Do you have any idea how I've spent these past ten years? I'll turn the entire shinobi world into fuel for my power!"

Sporting a physique of monstrous muscle, as though he has walked straight off the set of Baki, Denji Akimichi looks at Kaguya Otsutsuki and grins, revealing a mouthful of razor-sharp teeth.

"You'd better give me a fight I can really enjoy this time."